St. Clair County EMA Director Herb Simmons said 20 sirens in the southern part of the county did not sound when that area was ...

Milwaukee County officials said new technology will improve its tornado sirens, providing a major upgrade to how it sounds ...

A tornado warning in Bowling Green and parts of Wood County, Ohio, sent residents rushing to shelter as sirens blared and ...

The City of Tulsa says the siren heard in south Tulsa was triggered during maintenance work by a vendor. City councilors say ...

The siren is tested audibly once a month.

Whether an alert comes from an outdoor siren or a cellphone, it starts with information from the National Weather Service.